Muffler



J. T. MALSACK.

MUFFLER.

APPLICATION FILED OCT-11,1920.

,408,'6 14, Patented Jan. 17, 1922.

O O 4 y" 0 ln.

I A? I l I Z i v UNITED STATES PATENT OFFlCE.

JACOB T. MALSACK, F HARTFORD, WISCONSIN, ASSIGNOR OF ONE-HALF TO AUGUSTW. RUEHL, 0F BEAVER DAM, WISCONSIN.

MUFFLER.

Specificationof Letters Patent.

Patented Jan. 17, 1922.

Application filed October 11, 1920. Serial No. 416,044.

To all whom it may concern Be it known that I. JAooB T. MALSACK, acitizen of the United States, and resident of Hartford, in the county ofWashington and State of Wisconsin, have invented certain new and usefulImprovements in Mufllers;

. and I do hereby declare that the following is a full, clear, and exactdescription thereof.

My invention refers to mufflers and has for its object to provide asimple, economical and effective muffler combined with a cutoutmechanism, which is in the nature of a. built-in structure. Specificobjects of my invention are:

To provide an expansion drum having radially disposed delivery anddischarge pipes extending through the drum, and in communication with areceiving chamber at the front end of the drum, the pipes being adaptedto direct the gases in a zig-zag course to the point of discharge andundervalve control, to produce a direct exhaust.

charge, whereby the mulfling effect may be produced or the gases may bedischarged directly.

To arrange the discharge pipe in such manner that the gases areexhausted in a direct line parallel to the drum to thus avoid dust.

To provide the valve mechanism or cut-out as a built-in proposition andso encased as to be protected against mud and dust.

the invention consists in certain peculiari- To provide a lightstructure and to so standardize the parts that they may beinterchangeable.

lVith the above and-other objects in view,

ties of construction and combination of parts, as will hereinafter beset forth, with reference to the accompanying illustrations andsubsequently claimed.

In the drawings,

Figure 1 represents a longitudinal sectional view of a muffler embodyingthe features of my invention, and

Figure 2 a cross section of the same through the receiving chamber offorward head portion, the section being indicated by line 2-2 of Figure1.

Referring by characters to the drawings, 1 represents an expansion drumhaving closed end walls 23. The front end wall 3 is encased by ashell-like head 4, and has a nipple 4 extending therefrom, which nippleconstitutes an intake port. The head in connection with the wall 3 thusforms a receiving chamber 5 for the gases.

The drum is also provided with a discharge pipe 6 opening at its endsand extending longitudinally through the rear wall 2 of the dischargedrum, with its open front end suitably secured to a correspondingaperture in the wall 3, to thereby form an intake opening. The dischargepipe is also provided with a series of radially disposed apertures 7nearits intake end.

A delivery pipe 8 is also mounted in the discharge drum, same beingshown spaced from the discharge pipe. The rear end wall 8 of this pipeis closed and the front end of the same is opened and suitably securedto the wall 3, whereby it is in communication with the receiving chamber5. The rear portion of the pipe 8 is provided with a series of radiallydisposed vent apertures 7 for the gases.

Fitted in the chamber 5 is a valve housing 9. This housing is providedwith a port opening 4", which communicates with the intake port 4' andthe diagrammatically opposite port 10 which communicates with thedischarge pipe intake mouth. The valve housing is also provided with abottom port 10', which communicates with the receiving chamber 5. Theports 10 and 10 of the housing are controlled by a flat'valve 11, whichvalve is mounted upon a stem 12 that projects through the drum and hassecured thereto a suitable actuating arm. Hence, it will be seen fromthe foregoing descrip tion that if the cut-out valve 11 is swungdownwardly to close the port 10 exhaust gases from the engine will bedischarged directly through the pipe 6. Should the cutout valve 11 beshifted so as to close the port 10, obviously as indicated by thearrows, the spent gases will pass into the receiving chamber 5 andexpand. They will then enter the delivery pipe 8 and travel throughoutits length, being discharged into the expansion drum in the rear end,whereby they will expand and travel forwardly, at which point they' willenter the discharge pipe 6 through the perforation 7 and from thencethey may be exhausted in a direct line paralleling the drum through theopen rear end of the aforesaid discharge pipe. Thus, it will be seenthat. a simple, inexpensive and effective muffler structure is provided,wherein it will; perform all the necessary functions of such mufllers,without liability to become disarranged, or to create back pressure, allof the parts being enclosed.

While I have shown one exemplification of my invention in all of itsdetails, it is understood that I may vary structural features within thescope of the claims.

I claim:

1. A muflier comprising a closed ended expansion drum having a forwardlydisposed receiving chamber, provided with an intake port, a deliverypipe extending within the drum having an open front end and a closedrear end, the walls of said pipe near its rear end being perforated,adischarge pipe extendinggin'to the drum having open intake anddischarge ends, said pipe being.

positioned parallel with relation to the first mentioned pipe andprovided with perforated side walls near its intake end, a valve housingfitted into the receiving chamber inlet port communicating with thedischarge pipe.

2. A muffler comprising a closed drumhaving a forwardly positionedreceiving chamber provided with an intake port, a

'valve housing mounted therein, provided with a direct discharge port,and a second port in communication with the receiving chamber, a valvefor controlling said ports selectively, a delivery pipe in communicationwith the chamber having its rear end in communication With the expansiondrum, and a discharge pipe within theexpansion drum, having its forwardend in communication with the direct discharge port of the valvehousing, the said forward end of the discharge pipe beingin'communication with the aforesaid drum. In testimony that I claim theforegoing I have hereunto set my hand at Hartford,

'Wisconsin.

JACOB T. MALSACK.

